Field Notes
Plain-language notes on components, circuits and how to read a schematic, written for people at the bench, not for a classroom.
Field Notes
Top 10 Thermostat Related Problems
Regardless of the type of system or brand of thermostat, it is important to understand that there are many issues that can prevent a thermostat from operating properly...
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HVAC DELTA T (ΔT) Explained for Air Conditioners!
Delta T is a term that gets thrown around in the HVAC field quite a bit, but what does it really mean, what is its purpose, and does it really matter? So, what is Delt...
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Filter Drier, Solenoid Valve and Liquid Line Sight Locations in a Refrigeration System
The filter drier, solenoid valve, and liquid line sight have unique responsibilities in an automatic pump down refrigeration system. To use each of these components to...
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Top 4 Reasons Why a Gas Furnace Short Cycles
Short cycling means a gas furnace is running through its full sequence of operation for heat, it is providing heat in the building, and then it is shutting off before ...
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How the Gas Pilot Light Functions and 10 Reasons Why the Pilot Light Goes Out or Won’t Stay Lit!
Pilot lights can be found on furnaces, water heaters, fireplaces, ranges, ovens and other appliances. First, let’s discuss how the pilot light works before getting int...
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Newer Methods that Make us Better Techs and Reduce Labor and Frustration! Top 15!
Newer or faster methods do not always require expensive tools but do require a certain tool setup and step by step procedure. Some of the most labor intensive and time...
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